Cisco 7800 Series Administration Manual page 27

Cisco IP Phone Hardware
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Cisco IP Phone Hardware Overview
The Cisco IP Phone provides voice communication over an Internet Protocol (IP) network. The Cisco IP Phone
functions much like a digital business phone, and allows you to place and receive phone calls and to access
features such as mute, hold, transfer, speed dial, call forward, and more. In addition, because the phone
connects to your data network, it offers enhanced IP telephony features, such as access to network information
and services, and customizable features and services
The Cisco IP Phones have the following features:
• Programmable line keys supports up to 16 lines (Cisco IP Phone 7821 supports 2 lines, Cisco IP Phone
• Gigabit ethernet connectivity. (This applies only to Cisco IP Phone 7841.)
• Support for an external microphone and speakers.
A Cisco IP Phone, like other network devices, must be configured and managed. These phones encode G.711
a-law, G.711 mu-law, G.722, G.722.2/AMR-WB, G.729a, G.729ab and iLBC codecs; and decode G.711
a-law, G.711 mu-law, G.722, G.722.2/AMR-WB, G.729a, G.729ab and iLBC codecs.
Cisco IP Phone Hardware Overview, page 13
Cisco IP Phone 7811, page 14
Cisco IP Phone 7821, page 15
Cisco IP Phone 7841, page 16
Cisco IP Phone 7861, page 17
Buttons and Hardware, page 18
Terminology Differences, page 20
7841 supports 4 lines, and Cisco IP Phone 7861 supports 16 lines) or that can be programmed for other
features.
The Cisco IP Phone 7811 does not support programmable line key.
Note
C H A P T E R
Cisco IP Phone 7800 Series for Third-Party Call Control Administration Guide
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